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Helicopter lifting: lifting capacity up to 26T, used in other hoisting machinery can not be completed, such as mountains, high altitude places. Mast System Ceiling: typically system consists of a mast, wind cable rope. Improve the system, dragging row roll bar system, traction leavened end system components. Mast with a single mast, twin mast, the mast word, gates, mast, Tic-Tac-Mast; hoist lifting system has a pulley system, hydraulic lifting system, hydraulic jacking system; a single mast and with double mast lift-off method, pull the switch ( single turn, double turn) Act, no anchor recommended method in lifting technology. The difference between conventional and unconventional hoisting hoisting First, use a different amount of manpower. Conventional hoisting method, has been set up positions and responsibilities of personnel, such hook members, signalman and so on, the number of personnel is fixed. With the conventional method is different, the number of indigenous lifting when lifting removal companies generally spend more, such as roll bar handling, lifting derrick, people tend to use up to ten people, and the use of forklifts, cranes hoisting handling, four to Five people can get. Second, the various potential risks sizes. In general, conventional methods have security measures expressly provided, according to regulations hoisting, lifting accident usually does not occur, but indigenous lifting, many tools are made, some of the lifting methods are new, so it is safe or hoisting equipment technology security, there are some risks, greater risk. Furthermore, different lifting efficiency. The use of conventional lifting more frequently, has formed a good fit between employees, their job responsibilities and the next job content, are very familiar with lifting efficiency is high. But indigenous hoisting, every hoisting, lifting method may have been a new design, the staff need to learn this method, less lifting efficiency. Chinese hoist crane development Shijie Shao was started in the 1950s in China hoist cranes, but also counterfeit period. Before the founding of New China, the hoist crane is a gap in our country, can be described as nothing, and the early 1950s, the Soviet Union like to copy counterfeit started. 1949, July former general machinery plant in Shanghai, China crane expert trial out of imitation DEMAG Germany's third-generation K-type wire rope hoist, which is China's first own manufacture electric hoist, the plant but also have a small group of children Production of lifting the 1.5t and 3t general purpose wire rope hoist, but converting the steam turbine plant from 1954 without reproduction hoist. 1953 Tianjin Lifting Equipment Factory (Tianjin three stone by the formation of a number of small plants seventh Tianjin Machinery Plant renamed) begin copy of the Soviet 1940s TB product type electric hoist, when trial and has produced 1t and 2t products , 1954 and trial production of 3t and St products. The early 1950s, China's TB code for TB, TB was incurable, Soviet TB type hoist B letters with Chinese pinyin pronunciation of V Russian alphabet, so at that time will be changed TV type TB-type electric wire rope gourd. 1957 Tianjin plant completed the TV type 0.25-5t, SIN type 10t (double drum hoist two 5tTV type combination) trial and produce a full range of products. Since Yao Tianjin Lifting Equipment Factory production of the first generation of China's Li wire rope hoist manufacturers. 1954 Tianjin Lifting Equipment Factory has successively copy of the Soviet truss type HK electric single girder cranes and ⅡK electric single-girder overhead crane, 1956 has been able to produce batches basin supply.